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From: anon@rouge.usl.edu (Anonymous NNTP Posting)
Newsgroups: comp.lang.c
Subject: Funny behavior under TURBO compiler
Keywords: TURBO C++, local, global
Message-ID: <27668@rouge.usl.edu>
Date: 22 Mar 91 18:54:57 GMT
Organization: Univ. of Southwestern Louisiana
Lines: 52


Hi Netters,

I am unable to understand the behavior of following program compiled under TURBO C++ compiler. This program prints numbers 1-12. 

When "TB2 tbl" declaration is local to main() (as shown) the program works fine and the results are printed as :
1 2 3 4 5 6 7 8 9 10 11 12

If I make "TB2 tbl" a global variable the results are:
10 11 12 10 11 12 10 11 12 10 11 12

What's wrong , I couldn't figure out...

Anyone has clues..

Thanx,

Rajiv (EMAIL: rxd0219@usl.edu)
 


%%%%%%%%%%%%%%%%%%%%%%%%% CODE %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
#include <stdio.h>
#include <alloc.h>

typedef int *TB1[3];
typedef TB1 *TB2[4];

main() 
{
	int i, j, k=1;
	TB2 tbl;

	for (i = 0; i < 4; i++)
		for (j = 0; j < 3; j++)
		{
		if ( ((*tbl[i])[j] = (int *)malloc(sizeof(int))) == NULL)
			{
			printf("malloc error\n");
			exit(1);
			}

		*((*tbl[i])[j]) = k++;
		}

	for (i = 0; i < 4; i++)
		for (j = 0; j < 3; j++)
			printf("%d ", *((*tbl[i])[j]));
}
%%%%%%%%%%%%%%%%%%%%% END OF CODE %%%%%%%%%%%%%%